DE102019118971A1 - Torsional vibration damper - Google Patents

Abstract

Torsional vibration damper (1) at least comprising an input part (2) and an output part (3) with a common axis of rotation (5) extending along an axial direction (4), the input part (2) and the output part (3) when a torque is transmitted are rotatable relative to one another to a limited extent along a circumferential direction (6), the torsional vibration damper (1) having at least one ramp system (7, 8) with rolling elements (9) through which a relative rotation (10) of the input part (2) and output part (3 ) can be converted into a displacement (11) along the axial direction (4) of at least one component (12) of the torsional vibration damper (1), the torsional vibration damper (1) having a plurality of energy storage elements (13), all energy storage elements (13) of the Torsional vibration damper (1) are arranged distributed along the circumferential direction (6) and each extend along the axial direction (4) and in the axial direction (4) are elastically deformable.

Description

The invention relates to a torsional vibration damper. The torsional vibration damper is used in particular in a drive train of a motor vehicle.

Torsional vibration dampers are torsional compliances that are specifically introduced into a drive train that is excited by periodic disturbances. The aim here is to shift the disruptive vibration resonances that occur in various operating situations to a speed range below the operating speeds as far as possible. Vibration resonances remaining in the operating speed range are dampened by an external or integrated friction device, the friction torque of which must be within defined limits. The friction device can in particular be designed independently of the torsional flexibility and is therefore not considered in the following.

In order to enable a largely supercritical operation with good vibration isolation from the disturbances in the drive, the highest possible torsional flexibility, i.e. a low torsional stiffness, is aimed for. However, the maximum drive torque must be covered at the same time, which requires a correspondingly high angle of rotation with low torsional rigidity. In a given installation space, however, the torsion angle that can be represented is naturally limited by the capacity of the energy storage device used and the components that are to be designed to be sufficiently robust and are in the torque flow. It is therefore advantageous to arrange the energy storage elements of the torsional vibration damper outside of a torque flow.

For certain applications, compact versions of torsional vibration dampers are required (i.e. small diameter, possibly greater available length along the axial direction). Such requirements are z. B. in front of motorcycles or electrical machines. In electrical machines, torsional vibration dampers z. B. be arranged within a rotor.

It is also known as an energy storage element z. B. to use a disc spring. Disc springs are, however, regularly produced by stamping and therefore have a cut edge on their force edge. As a result, the service life can be severely restricted, especially under pulsating loads, especially in comparison to compression springs or helical compression springs (the surface quality of compression spring wires is significantly better than that of the punched edge of a disc spring).

It is also known to use balls as rolling elements. However, these have comparatively small contact areas and therefore only have a low force capacity. An alternative possibility concerns cylindrical rollers, but these would not move along a circumferential direction when rolling.

Various types of torsional vibration dampers are known from the prior art. For example, from the FR 3058489 A1 a torsional vibration damper with compression springs acting in the circumferential direction is known. With a small outer diameter, the damper also has a comparatively great length in the axial direction.

From the DE 1 475 304 A1 a torsionally flexible clutch disc is known, with a disc part carrying the friction linings rotatable and resilient to a limited extent with a hub part via rolling elements, e.g. B. balls is in connection. The rolling bodies are arranged in sector-shaped pockets which are formed by recesses in the disk part and in intermediate pieces which are connected to the hub part in a rotationally fixed and axially resilient manner. Disk springs or a rubber ring are provided as spring elements.

From the DE 2 063 370 A1 a torsionally flexible clutch disc is known in which a web extending in the radial direction starting from the friction linings has pockets with rolling elements arranged therein. On the hub, spring-like springs are supported, which interact with the rolling elements and the pockets. The disks are supported on external disks in the area of the hub. The disks have tracks that are turned off in a spherical manner.

From the DE 3 500 920 A1 describes a torsionally flexible clutch disc in which a ramp system builds up elasticity, with damping caused by oil. The ramp system is depicted on disc springs; compression springs also support the disc springs in the axial direction.

In the DE 10 2015 211 899 A1 A1 discloses a torsional vibration damper in the form of a pendulum rocker damper (PWD). The pendulum rockers, referred to there as intermediate elements, operate energy stores while they are guided relative to the input part and output part via rolling elements that roll or slide in corresponding paths. This results in a torsion damper characteristic curve when the input part is rotated relative to the output part about the axis, the slope of which can be made variable by means of the shape of the tracks.

The object of the present invention is to at least partially solve the problems cited with reference to the prior art. In particular, a torsional vibration damper is to be proposed in which energy storage elements are arranged, in particular, outside a torque flow, disc springs are not used if possible, and rolling elements with a larger contact surface are used.

A torsional vibration damper with the features according to claim 1 contributes to the solution of these objects. Advantageous further developments are the subject of the dependent claims. The features listed individually in the patent claims can be combined with one another in a technologically meaningful way and can be supplemented by explanatory facts from the description and / or details from the figures, with further design variants of the invention being shown.

The use of indefinite articles (“a”, “an”, “an” and “an”), especially in the patent claims and the description reflecting them, is to be understood as such and not as a numerical word. The terms or components thus introduced are to be understood in such a way that they are present at least once and, in particular, can also be present several times.

The invention relates to a torsional vibration damper at least comprising an input part and an output part with a common axis of rotation extending along an axial direction. The input part and the output part can be rotated to a limited extent relative to one another along a circumferential direction when a torque is transmitted (e.g. introduction via the input part to the output part and forwarding via the output part; or vice versa). The torsional vibration damper has at least one ramp system with rolling elements, by means of which a relative rotation of the input part and output part can be converted into a displacement along the axial direction of at least one component of the torsional vibration damper. The torsional vibration damper has a plurality of energy storage elements, all of the energy storage elements of the torsional vibration damper being distributed (evenly) along the circumferential direction (and spaced from one another) and each extending along the axial direction and being elastically deformable in the axial direction.

The at least one ramp system is designed between the input part and the output part such that a relative rotation of the input part and the output part can be converted into a displacement along the axial direction of at least one component of the torsional vibration damper. The energy storage elements can be elastically deformed in the axial direction via the at least one component.

In particular, the input part and output part are axially fixed (relative to one another) so that the displacement is transferred to the energy storage elements via another component.

In particular, the torsional vibration damper does not have any disc springs as energy storage elements that can be braced via the ramp systems.

In particular, the rolling elements roll exclusively along the circumferential direction. An axis of rotation (rolling axis) of each rolling element runs in particular along the radial direction or inclined in relation to the axial direction towards the radial direction.

In particular, the at least one ramp system has tapered rollers or conical spherical rollers as rolling bodies. In particular, the tip of a cone, formed by a jacket surface, of the rolling element designed as a conical roller is arranged on the axis of rotation. Pendulum rollers are also proposed for a ramp system, the jacket surfaces of which are arranged in particular on a common circular radius.

In particular, it can thus be guaranteed that when the rolling elements roll in the ramp system, the rolling elements move along the circumferential direction.

In particular, the energy storage elements are designed as compression springs. In particular, compression springs are used exclusively as energy storage elements.

In particular, a first group of rolling elements is arranged on a first diameter in a first ramp system and a second group of rolling elements is arranged on a second diameter (which differs from the first diameter) in a second ramp system.

In particular, the first group and the second group comprise rolling bodies that are different from one another or that are identical to one another.

In particular, the first ramp system is formed by the input part and a first disk extending along the circumferential direction around the axis of rotation, the first group (of rolling elements) being arranged between the input part and the first disk. The second ramp system is formed by the output part and the first disk, the second group (of rolling elements) is arranged between the output part and the first disc. The first disk is the component that can be displaced along the axial direction.

In particular, each ramp system is formed by first ramps and second ramps, with a rolling element being arranged between a first ramp and a second ramp, which form a pair of ramps. First ramps and second ramps are each formed on a component of the torsional vibration damper. The first ramps and the second ramps are arranged distributed along the circumferential direction on the respective component.

In particular, in the first group, a plurality of first ramps are formed on the input part. The second ramps of the first group are formed on the first disc.

In particular, in the second group, a plurality of first ramps are formed on the output part. The second ramps of the second group are formed on the first disc.

Is z. B. a torque is introduced into the torsional vibration damper via the input part, the rolling elements are rolled along from a rest position of the respective ramp pairing along the circumferential direction and along the ramp slope as a result of an existing torque gradient across the torsional vibration damper. Due to the geometrical relationship of the pair of ramps, the first disk is displaced in relation to the input part or the output part along the axial direction, an opposing force of the energy storage elements being overcome. When the torque gradient drops, the rolling elements roll back in the direction of the rest position, the energy storage elements being relieved or at least partially relaxed.

With this torque-related movement, the rolling body forces the first disk to move relative to the axial direction and the energy storage elements are tensioned accordingly. If there is a change in the applied torque and a corresponding speed difference between the input part and the output part, such as in the case of torsional vibration, the inertia of the other of the input part and output part counteracts this and the respective rolling element rolls (in a predetermined manner) along the ramps back and forth around the position corresponding to the applied torque. The respective rolling element counteracts the energy storage elements that are tensioned depending on a torque amount, so that a natural frequency is changed compared to a rest position or torque transmission without a torsional vibration damper (but with the same flywheel mass).

In particular, it is provided that the respective ramp pairing comprises a pulling torque pairing with a first transmission curve and a pushing torque pairing with a second transmission curve, the pulling torque pairing being set up to transmit torque from the input part to the output part and the pushing torque pairing being set up to transmit torque from the output part to the input part. In particular, the first gear ratio curve and the second gear ratio curve have gear ratios that differ from one another at least in regions.

Basically, a pulling torque and a pushing torque do not differ in a theoretical application. The terms are therefore to be seen neutrally and only serve to easily distinguish the designated torque transmission direction. These terms are taken from the usual designations in a drive train of a motor vehicle, but can be transferred accordingly for other applications.

In particular, the first transmission curve and the second transmission curve, which each start from a common point of the rest position, have different transmission progressions. The rigidity properties of the torsional vibration damper can therefore be set up (differently) for a pulling torque and a pushing torque.

In one embodiment, for example, a greater damping torque is required for the transmission of a pulling torque, which can be achieved over a larger angle of rotation (a lower reduction ratio, i.e. a smaller denominator of the transmission ratio) than is desired for a thrust torque (a larger reduction ratio). Furthermore, for example, progressive or degressive vibration damping or even multiply variable vibration damping is desirable. For example, a slight increase in damping torque is set up for the region close to idling and a steep increase in damping torque is set up for a main load torque, which again decreases increasingly degressively and increases again progressively up to a maximum amount of a transmittable torque.

In particular, each group comprises two rows of rolling elements, a first row of rolling elements cooperating with the first disk on a first side of the input part and the output part. A second row of rolling elements cooperate on a second side opposite the first side along the axial direction with a second disk extending along the circumferential direction about the axis of rotation. The second disk is also the component that can be displaced along the axial direction or thus forms a further component that is displaced along the axial direction when a torque gradient occurs.

The input part then has first ramps for each row of the first group. The first ramps are formed on the first side and on the second side of the input part.

In addition to the first disk (for the first row and the first group), the second disk for the second row (and the first group) also has second ramps.

The output part then also has first ramps for each row of the second group. The first ramps are formed on the first side and on the second side of the output part.

In addition to the first disk (for the first row and the second group), the second disk then also has second ramps for the second row (and the second group).

In particular, the second disk is arranged axially fixed at a first end of at least one connecting element. The at least one connecting element extends from the first end along the axial direction through the first disk up to a second end. The plurality of energy storage elements are arranged between the second end and the first disk.

When a torque gradient occurs, on the one hand the first disk is displaced along the axial direction (along a first axial direction). At the same time, the second disk is displaced along the axial direction (along a second axial direction opposite to the first axial direction). The first end and the second end of the connecting element are displaced along the axial direction (along the second axial direction) via the second disk, so that the energy storage elements are compressed on both sides, i.e. by the first disk and via the second end.

In particular, a plurality of connecting elements is provided which are distributed along the circumferential direction (and spaced apart from one another), with a third disk extending along the circumferential direction around the axis of rotation being arranged axially fixed at the second end, on which the plurality of energy storage elements are located opposite the support in the axial direction.

In particular, the plurality of energy storage elements (and the plurality of connecting elements) can be displaced at least along the axial direction with respect to the input part and the output part (i.e. not arranged axially fixed with respect to the input part and the output part) or rotatable along the circumferential direction with respect to the input part and the output part (i.e. not rotationally fixed with respect to the input part and the output part) (or both).

The at least one connecting element is connected to the second disk and / or to the third disk in particular via a screw or a rivet connection. In particular, the first end and / or the second end forms a rivet connection with the respective disk.

In particular, the at least one connecting element serves as a guide for the energy storage element. In particular, the connecting element extends through the energy storage element along the axial direction.

In particular, the torsional vibration damper is arranged within a housing. In particular, the torsional vibration damper can be arranged separately from other components via the housing. In particular, seals can be provided, via which the torsional vibration damper can be arranged in a fluid-tight manner within the housing. In particular, the torsional vibration damper is lubricated with oil or grease within the housing.
In particular, the rolling elements and / or the ramps are made remunerated.
In particular, the rolling elements consist of 100Cr6.
In particular, the ramps are made of case-hardened steel.
In particular, a separate cage is provided for each group of rolling elements.
In particular, a separate cage is provided for each row of rolling elements.
In particular, a common cage is provided for both groups of a number of rolling elements.
In particular, a common cage is provided for both rows of a group of rolling elements.
In particular, a common cage is provided for all rolling elements.

The rolling elements can be fixed in positions that are spaced apart and fixed relative to one another via a cage.

In particular, the torsional vibration damper has a greatest length (L) along the axial direction and a greatest diameter (D) along the radial direction (transverse to the axial direction). In particular, the largest diameter is formed by the input part and / or by the housing and the greatest length by the output part and / or by the housing. In particular, no (friction) linings that transmit torque to the input part are taken into account. In particular, the greatest length is greater than the greatest diameter * 0.3; so L> D * 0.3; in particular, L> D * 0.5 applies.

A component (for example an internal combustion engine, a friction clutch, an electrical machine, a generator, a two-mass oscillator, etc.) of a drive train is also proposed which has the torsional vibration damper described above.

As a precaution, it should be noted that the numerals used here (“first”, “second”, ...) primarily (only) serve to distinguish between several similar objects, sizes or processes, so in particular no dependency and / or sequence of these objects, sizes or prescribe processes to each other. Should a dependency and / or sequence be required, this is explicitly stated here or it is obvious to the person skilled in the art when studying the specifically described embodiment. If a component can occur several times (“at least one”), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.

• 1: einen Antriebsstrang mit einer Verbrennungskraftmaschine, einem Generator und einer elektrischen Maschine, wobei die möglichen Positionen zur Anordnung eines Torsionsschwingungsdämpfers dargestellt sind;
• 2: einen Torsionsschwingungsdämpfer in einer Ansicht entlang der Drehachse;
• 3: den Torsionsschwingungsdämpfer nach 2 in einer Seitenansicht im Schnitt entlang der Linie III-III gemäß 2;
• 4: den Torsionsschwingungsdämpfer nach 2 und 3 in einer Ansicht entlang der Drehachse, im Schnitt entlang der Linie IV-IV gemäß 5;
• 5: den Torsionsschwingungsdämpfer nach 2 bis 4 in einer Seitenansicht im Schnitt entlang der Linie V-V gemäß 4;
• 6: den Torsionsschwingungsdämpfer nach 2 bis 5 in einer Seitenansicht im Schnitt entlang der Linie VI-VI gemäß 4;
• 7: ein Detail VII gemäß 6 des Torsionsschwingungsdämpfers nach 2 bis 6;
• 8: ein Detail VIII gemäß 3 des Torsionsschwingungsdämpfers nach 2 bis 6;
• 9: ein Pendelrollenlager für den Torsionsschwingungsdämpfer in einer Seitenansicht im Schnitt;
• 10: das Pendelrollenlager nach 9 in einer verschwenkten Anordnung; und
• 11: ein Kegelrollenlager für den Torsionsschwingungsdämpfer in einer Seitenansicht im Schnitt.

The invention and the technical environment are explained in more detail below with reference to the accompanying figures. It should be pointed out that the invention is not intended to be restricted by the exemplary embodiments cited. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description. In particular, it should be pointed out that the figures and in particular the size relationships shown are only schematic. Show it:

• 1 : a drive train with an internal combustion engine, a generator and an electric machine, the possible positions for the arrangement of a torsional vibration damper being shown;
• 2 : a torsional vibration damper in a view along the axis of rotation;
• 3 : the torsional vibration damper after 2 in a side view in section along the line III-III according to FIG 2 ;
• 4th : the torsional vibration damper after 2 and 3 in a view along the axis of rotation, in section along the line IV-IV according to FIG 5 ;
• 5 : the torsional vibration damper after 2 to 4th in a side view in section along the line VV according to 4th ;
• 6th : the torsional vibration damper after 2 to 5 in a side view in section along the line VI-VI according to FIG 4th ;
• 7th : a detail according to VII 6th of the torsional vibration damper 2 to 6th ;
• 8th : a detail according to VIII 3 of the torsional vibration damper 2 to 6th ;
• 9 : a spherical roller bearing for the torsional vibration damper in a side view in section;
• 10 : the spherical roller bearing after 9 in a pivoted arrangement; and
• 11 : a tapered roller bearing for the torsional vibration damper in a side view in section.

The 1 shows a drive train with an internal combustion engine 30th , a generator 31 and an electric machine 32 , the possible positions for the arrangement of a torsional vibration damper 1 are shown. With the electric machine 32 can the torsional vibration damper 1 inside the rotor 33 to be ordered.

2 shows a torsional vibration damper 1 in a view along the axis of rotation 5 . 3 shows the torsional vibration damper 1 after 2 in a side view in section along the line III-III according to FIG 2 . 4th shows the torsional vibration damper 1 after 2 and 3 in a view along the axis of rotation 5 , in section along the line IV-IV according to 5 . 5 shows the torsional vibration damper 1 after 2 to 4th in a side view in section along the line VV according to 4th . 6th shows the torsional vibration damper 1 after 2 to 5 in a side view in section along the line VI-VI according to FIG 4th . 7th shows a detail VII according to 6th of the torsional vibration damper 1 after 2 to 6th . 8th shows a detail VIII according to 3 of the torsional vibration damper 1 after 2 to 6th . The 2 to 8th are described together below.

The torsional vibration damper includes an input part 2 and an output part 3 with a common, extending along an axial direction 4th extending axis of rotation 5 . The entrance part 2 and the output part 3 are when transferring a Torque (e.g. introduction via the input part 2 towards the exit part 3 and forwarding via the output part 3 ; or vice versa) along a circumferential direction 6th rotatable to a limited extent relative to one another. The torsional vibration damper 1 has two ramp systems 7th , 8th with rolling elements 9 on, through which a relative twist 10 from input part 2 and output part 3 in a relocation 11 along the axial direction 4th at least one component 12 (the first disc 18th , the second disc 23 , the fastener 25th , the third disc 27 ) of the torsional vibration damper 1 can be implemented. The torsional vibration damper 1 has a plurality of energy storage elements 13 on, with all energy storage elements 13 of the torsional vibration damper 1 along the circumferential direction 6th evenly distributed and arranged at a distance from one another and each along the axial direction 4th extend and in the axial direction 4th are elastically deformable.

The entrance part 2 and the output part 3 are axially fixed to each other, so that the displacement 11 via another component 12 on the energy storage elements 13 is transmitted.

The ramp systems 7th , 8th have tapered rollers as rolling elements 9 on. The energy storage elements 13 are designed as compression springs.

A first group 14th of rolling elements 9 is on a first diameter 15th in a first ramp system 7th and a second group 16 of rolling elements 9 on one (of the first diameter 15th different) second diameter 17th in a second ramp system 8th arranged.

The first group 14th and the second group 16 have different rolling elements 9 on.

The first ramp system 7th is through the entrance part 2 and one extending along the circumferential direction 6th around the axis of rotation 5 extending first disc 18th formed, the first group 14th between the input part 2 and the first disc 18th is arranged. The second ramp system 8th is through the output part 3 and the first slice 18th formed, the second group 16 between the output part 3 and the first disc 18th is arranged. The first slice 18th is one of those along the axial direction 4th relocatable components 12 .

Any ramp system 7th , 8th is through first ramps 28 and second ramps 29 formed, each with a rolling element 9 between a first ramp 28 and a second ramp 29 , which form a pair of ramps, is arranged. With the first group 14th is a plurality of first ramps 28 at the entrance part 2 educated. The second ramps 29 the first group 14th are on the first disc 18th educated. In the second group 16 is a plurality of first ramps 28 at the output part 3 educated. The second ramps 29 the second group 16 are on the first disc 16 educated.

Every group 14th , 16 includes two rows 19th , 20th of rolling elements 9 , being a first row 19th of rolling elements 9 on a first page 21st of the input part 2 and the output part 3 with the first slice 18th work together. A second row 20th of rolling elements 9 act on one of the first page 21st along the axial direction 4th opposite second side 22nd with a one extending along the circumferential direction 6th around the axis of rotation 5 extending second disc 23 together. The second disc too 23 is one along the axial direction 4th relocatable component 12 .

The entrance part 2 assigns for each row 19th , 20th the first group 14th first ramps 28 on. The first ramps 28 are on the first page 21st and on the second side 22nd of the input part 2 educated.

Next to the first disc 18th (for the first row 19th and the first group 14th ) also has the second disc 23 for the second row 20th and the first group 14th second ramps 29 on.

The starting part 3 assigns for each row 19th , 20th the second group 16 first ramps 28 on. The first ramps 28 are on the first page 21st and on the second side 22nd of the output part e formed.

Next to the first disc 18th for the first row 19th and the second group 16 also has the second disc 23 for the second row 20th and the second group 16 second ramps 29 on.

The second slice 23 is at a first end 24 of a connecting element 25th axially fixed. The connecting element 25th extends from the first end 24 along the axial direction 4th through the first slice 18th to a second end 26th . At the second end 26th is a third disc 27 axially fixed. The plurality of energy storage elements 13 are along the axial direction 4th between the second end 26th or the third disc 27 and the first disc 18th arranged.

When a torque gradient occurs, the first disk is on the one hand 18th along the axial direction 4th (along a first axial direction). At the same time, the second disc 23 along the axial direction 4th (along a second axial direction opposite to the first axial direction). About the second disc 23 will be the first ending 24 and the second end 26th of the connecting element 25th along the axial direction 4th (along the second axial direction) displaced so that the energy storage elements 13 on both sides, i.e. through the first pane 18th and about the second end 26th or the third disc 27 , be compressed.

The plurality of energy storage elements 13 and the plurality of connecting elements 25th are along the axial direction 4th opposite the entrance part 2 and the output part 3 displaceable (i.e. not axially fixed with respect to the input part 2 and the output part 3 arranged) and along the circumferential direction 6th opposite the entrance part 2 and the output part 3 rotatable (i.e. not rotationally fixed with respect to the input part 2 and the output part 3 ) arranged.

The connecting element 25th is riveted to the second disc 23 connected. This forms the first end 24 a riveted connection to the second disc 23 .

The connecting element 25th serves as a guide for the energy storage element 13 . The connecting element 25th extends along the axial direction 4th by the energy storage element 13 through.

The torsional vibration damper 1 is within a housing 34 arranged. About the case 34 it can be arranged separately from other components. They are seals 35 provided over which the torsional vibration damper 1 inside the case 34 is arranged fluid-tight.

For every group 14th , 16 and every row 19th , 20th of rolling elements 9 each is its own cage 36 intended.

9 shows a spherical roller bearing for the torsional vibration damper 1 in a side view in section. 10 shows the spherical roller bearing 9 in a pivoted arrangement, with the axes of rotation 5 are tilted to each other. The 9 and 10 are described together below.

The rolling elements 9 are designed as conical spherical rollers, their outer surfaces 37 on a common circle radius 38 are arranged.

11 shows a tapered roller bearing for the torsional vibration damper 1 in a side view in section. The summit 39 one from a mantle surface 37 formed cone of the rolling element designed as a tapered roller 9 is on the axis of rotation 5 arranged.

List of reference symbols

1

Torsional vibration damper

2

Input part

3

Output part

4th

axial direction

5

Axis of rotation

6th

Circumferential direction

7th

first ramp system

8th

second ramp system

9

Rolling elements

10

Twist

11

Relocation

12

Component

13

Energy storage element

14th

first group

15th

first diameter

16

second group

17th

second diameter

18th

first slice

19th

first row

20th

second row

21st

first page

22nd

second page

23

second disc

24

first end

25th

Connecting element

26th

second end

27

third slice

28

first ramp

29

second ramp

30th

Internal combustion engine

31

generator

32

electric machine

33

rotor

34

casing

35

poetry

36

Cage

37

Mantle surface

38

Circle radius

39

top

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• FR 3058489 A1 [0007]
• DE 1475304 A1 [0008]
• DE 2063370 A1 [0009]
• DE 3500920 A1 [0010]
• DE 102015211899 A1 [0011]

Claims (10)

Torsional vibration damper (1) at least comprising an input part (2) and an output part (3) with a common axis of rotation (5) extending along an axial direction (4), the input part (2) and the output part (3) when a torque is transmitted are rotatable relative to one another to a limited extent along a circumferential direction (6), the torsional vibration damper (1) having at least one ramp system (7, 8) with rolling elements (9) through which a relative rotation (10) of the input part (2) and output part (3 ) can be converted into a displacement (11) along the axial direction (4) of at least one component (12) of the torsional vibration damper (1), the torsional vibration damper (1) having a plurality of energy storage elements (13), all energy storage elements (13) of the Torsional vibration damper (1) are arranged distributed along the circumferential direction (6) and each extend along the axial direction (4) and in the axial direction (4) are elastically deformable. Torsional vibration damper (1) Claim 1 , the at least one ramp system (7, 8) having tapered rollers or conical spherical rollers as rolling elements (9). Torsional vibration damper (1) according to one of the preceding claims, wherein the energy storage elements (13) are designed as compression springs. Torsional vibration damper (1) according to one of the preceding claims, wherein a first group (14) of rolling elements (9) on a first diameter (15) in a first ramp system (7) and a second group (16) of rolling elements (9) on one second diameter (17) are arranged in a second ramp system (8). Torsional vibration damper (1) Claim 3 wherein the first group (14) and the second group (16) comprise different or identical rolling elements (9). Torsional vibration damper (1) according to one of the preceding Claims 3 and 4th , wherein the first ramp system (7) is formed by the input part (2) and a first disc (18) extending along the circumferential direction (6) around the axis of rotation (5), the first group (14) between the input part (2 ) and the first disc (18) is arranged; wherein the second ramp system (8) is formed by the output part (3) and the first disc (18), the second group (16) being arranged between the output part (3) and the first disc (18); wherein the first disk (18) is the component (12) which can be displaced along the axial direction (4). Torsional vibration damper (1) Claim 5 wherein each group (14, 16) comprises two rows (19, 20) of rolling elements (9), a first row (19) of rolling elements (9) on a first side (21) of the input part (2) and the output part (3) cooperate with the first disc (18); wherein a second row (20) of rolling elements (9) on one of the first side (21) along the axial direction (4) opposite second side (22) with a one extending along the circumferential direction (6) around the axis of rotation (5) second disk (23) cooperates, the second disk (23) also being the component (12) which can be displaced along the axial direction (4). Torsional vibration damper (1) Claim 6 wherein the second disc (23) is arranged axially fixed at a first end (24) of at least one connecting element (25); the connecting element (25) extending from the first end (24) along the axial direction (4) through the first disc (18) to a second end (26), the plurality of energy storage elements (13) between the second end (26) and the first disc (18) are arranged. Torsional vibration damper (1) Claim 7 , wherein a plurality of connecting elements (25) are provided, which are arranged distributed along the circumferential direction (6), a third disk (27) extending along the circumferential direction (6) around the axis of rotation (5) at the second end (26) ) is arranged axially fixed, on which the plurality of energy storage elements (13) are supported in relation to the axial direction (4). Torsional vibration damper (1) according to one of the preceding claims, wherein the plurality of energy storage elements (13) can be displaced at least along the axial direction (4) with respect to the input part (2) and the output part (3) or along the circumferential direction (7) with respect to the input part ( 2) and the output part (3) are rotatably arranged.

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